GB1174683A - Method of Final Grinding and Polishing of Hydrophilic Contact Lenses - Google Patents

Method of Final Grinding and Polishing of Hydrophilic Contact Lenses

Info

Publication number
GB1174683A
GB1174683A GB8142/67A GB814267A GB1174683A GB 1174683 A GB1174683 A GB 1174683A GB 8142/67 A GB8142/67 A GB 8142/67A GB 814267 A GB814267 A GB 814267A GB 1174683 A GB1174683 A GB 1174683A
Authority
GB
United Kingdom
Prior art keywords
lens
polishing
final grinding
plate
shape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8142/67A
Inventor
Otto Wichterle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Czech Academy of Sciences CAS
Original Assignee
Czech Academy of Sciences CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Czech Academy of Sciences CAS filed Critical Czech Academy of Sciences CAS
Publication of GB1174683A publication Critical patent/GB1174683A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/0025—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor for contact lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/04—Contact lenses for the eyes

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)

Abstract

1,174,683. Abrading lenses. CESKOSLOVENSKA AKADEMIE VED. 21 Feb., 1967 [22 Feb., 1966], No. 8142/67. Heading B3D. [Also in Division C3] A method of final grinding and polishing of a hydrophilic contact lens comprises deforming the lens at a temperature higher than its softening temperature by pressing it into a defined surface, and subjecting it to a final grinding and polishing after cooling it in its deformed state and while in such state. The lens is moulded from a monomer mixture of glycolmonomethacrylate, glycoldimethacrylate and isopropylpercarbonate and is washed in distilled water and dried. A rubber stopper heated to 150‹ C. is used to press the lens on to a ground glass plate also heated to 150‹ C. As the lens softens it flattens on to the plate and upon cooling returns the flat shape so that, upon removal from the plate, it can be ground by a planar grinding plate covered with woollen fabric impregnated with eerie oxide in xylene. The lens may be relaxed to its initial moulded shape by reheating or by contact with water or physiologic solution. In another example, the lens is deformed to a spherical or cylindrical shape for final grinding and polishing. The lens may be deformed to a second shape for treatment of its other surface.
GB8142/67A 1966-02-22 1967-02-21 Method of Final Grinding and Polishing of Hydrophilic Contact Lenses Expired GB1174683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS117066 1966-02-22

Publications (1)

Publication Number Publication Date
GB1174683A true GB1174683A (en) 1969-12-17

Family

ID=5345388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8142/67A Expired GB1174683A (en) 1966-02-22 1967-02-21 Method of Final Grinding and Polishing of Hydrophilic Contact Lenses

Country Status (10)

Country Link
US (1) US3542907A (en)
AT (1) AT267907B (en)
BE (1) BE694078A (en)
DE (1) DE1704530B2 (en)
DK (1) DK116168B (en)
ES (1) ES337101A1 (en)
FR (1) FR1516294A (en)
GB (1) GB1174683A (en)
NL (1) NL143845B (en)
SE (1) SE309110B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822089A (en) * 1968-09-25 1974-07-02 Akademie Ved Contact lens blank or replica made from anhydrous, sparingly cross-linked hydrophilic copolymers
GB1362380A (en) * 1971-11-25 1974-08-07 Mullard Ltd Manufacture of optical elements
US4042652A (en) * 1974-03-28 1977-08-16 Agfa-Gevaert, A.G. Method for the production of silicone elastomer-containing articles
US4322139A (en) * 1978-06-21 1982-03-30 Spofa, Spojene Podniky Pro Zdravotnickou Vyrobu Hydrophilic-gel contact lenses adapted into a planarized xerogel state and method for making the same
US4212836A (en) * 1978-09-05 1980-07-15 Corning Glass Works Method of forming thin thermoplastic elements of complex curvature
CA1184367A (en) * 1981-06-22 1985-03-26 Novartis Ag Process for producing shaped articles having improved surfaces
US4693446A (en) * 1985-09-20 1987-09-15 Techna Vision, Inc. Gasket for molding plastic lenses
WO2006055707A2 (en) * 2004-11-18 2006-05-26 Ocularis Pharma, Inc. Composition and method for modifying contact lens shape

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124623A (en) * 1964-03-10 method of shaping crystal blanks
US2342378A (en) * 1940-08-27 1944-02-22 Univis Lens Co Method of molding
US2302918A (en) * 1940-09-12 1942-11-24 Univis Lens Co Method of molding blanks of predetermined mass
US2664025A (en) * 1949-10-06 1953-12-29 American Optical Corp Contact lenses and method of making same
US3221083A (en) * 1960-08-18 1965-11-30 American Optical Corp Optical elements formed of resinous materials and process for making the same
US3064401A (en) * 1960-09-02 1962-11-20 Bausch & Lomb Method of making aspheric optical elements
US3248460A (en) * 1963-02-28 1966-04-26 Bausch & Lomb Method of making lenses
US3297422A (en) * 1963-04-05 1967-01-10 Unvivis Inc Method of making molds for multifocal ophthalmic lenses
US3263005A (en) * 1963-04-17 1966-07-26 Harold C Emerick Process for producing contact lenses and other optical aids
DE1495381B2 (en) * 1963-09-07 1971-06-24 Czeskoslovenska akademie ved , Prag METHOD FOR MANUFACTURING CONTACT LENSES OR CONTACT LENS BLOCKS FROM SWELLABLE HYDROGELS

Also Published As

Publication number Publication date
FR1516294A (en) 1968-03-08
NL143845B (en) 1974-11-15
SE309110B (en) 1969-03-10
US3542907A (en) 1970-11-24
DE1704530B2 (en) 1977-01-27
AT267907B (en) 1969-01-27
NL6702367A (en) 1967-08-23
BE694078A (en) 1967-07-17
DE1704530A1 (en) 1971-05-19
DK116168B (en) 1969-12-15
ES337101A1 (en) 1968-01-16

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Legal Events

Date Code Title Description
416 Proceeding under section 16 patents act 1949
PS Patent sealed [section 19, patents act 1949]
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee